Full Crane Safety / LMI / SLI System - crane Spare Parts for boom truck cranes

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Whats Load Moment Indictor Meaning?

Load Moment Indicator (LMI), also known as Rated Capacity Indicators (RCI),  or a Safe Load Indicator (SLI) or an Automatic Safe Load Indicator (ASLI) is a device which is installed on mobile or portal cranes to alert the operator if the lift is exceeding the safe operating range of the crane. In some cases, the device will physically lock the machinery in circumstances it determines to be unsafe. LMI systems are usually composed of a microprocessor connected to various sensors on the crane itself. The LMI measures the angle and extension of the boom along with the load weight and compares this with the manufacturer's specifications to determine if the lift is safe.

A safe load indicator has the capability of detecting the angle, weight of load lifted, and ground radius of any lifting device. It controls the lifting equipment to the level that it tries to keep the crane functioning as per the manufacturer's suggested safety charts.

The crane is fitted with multiple sensors, for each of the measured parameters, which are then further displayed in the operator's cabin for his benefit.

How Does a Load Moment Indicator Alarm Working?

Sound and light alarm function: when the crane boom work amplitude limit close to work, when lifting load and torque device close to the permitted load limit, torque system issued a warning of slow beeping sound. Warning lights flashing slowly torque system.

When jib frame work scope to work limit, when the lifting load and torque reaches equipment when the permitted load limit moment send urgent alarm beeping sound. Shortness of loading system alarm indicating three color warning light flashing.

•The LMI is an operational aid that warns a crane operator of approaching overload conditions and over hoist conditions that could cause damage to equipment and personnel.

•The device is not, and shall not, be a substitute for good operator judgment, experience and use of accepted safe crane operating procedures.

•The responsibility for the safe crane operation shall remain with the crane operator who shall ensure that all warnings and instructions supplied are fully understood and observed.

•Prior to operating the crane, the operator must carefully and thoroughly read and understand the information in this manual to ensure that he knows the operation and limitations of indicator and crane.

•Proper functioning depends upon proper daily inspection and observance of the operating instructions set forth in the operators manual.

Why Choose WTAU Brand Crane Load Moment Indicator System?

Our WTL-A100N crane safe load indicator (SLI) can be fitted with any type crane that is used to alert the operator if the lift is exceeding the range. Our Offered systems are manufactured using excellent quality components. So, You can rest assured that our crane safe load indicators give you a long functional life and hassle free performance.

WTAU Brand Crane LMI System Advantages

•    Easy to Install

•    Accurate display of value

•    Excellent Sensing

•    High Performance

•    Low Maintenance

•    Can fitted with all types (mobile, crawler, tower etc) cranes

•    An optional data logger that can be used to record all the lifting activity

•    All Our Indicators comes with the 1-year warranty.

Technical Paramters

Display: LCD
Working Voltage: DC 24V±15%
System Error: >±5%
Init Output Junction: DC 24V, 7A
Working Temperature:－20℃～60℃
Working Humidity: 95%(25℃)
Power Dissipation：< 10W
Alarm Volume：>60db


Application Cases


Company Information

Weite Technologies focusing on crane lifting equipment safety management since 2002,our own brand is WTAU,China Top 3 brand OEM manufacturer of load moment indicator system.

We help protect cranes and lifting equipment under safety working condition with customized WTAU Load  Moment Indicator(LMI) System, Crane Management System,Safe Monitoring System, Anti Collision System, Crane Remote Monitoring &Management Platform,Marine CCTV Camera System, Overload Limiter, length angle sensor, load cell sensor, Anemometers, A2B anti two block device etc.

Nowadays, WTAU products are widely used in marine,electrical, chemical, steel, metallurgy, construction, ports and other industries, and have been wide spreaded to over 60 countries and regions.
 

FAQ
Q1:Who are you?
A1:This is Cherry from Weite Technologies Co.,Ltd. I am the Crane Safety Manager.

Q2: What does your company do?
A2: We assist crane owner and operators to keep their crane fleets under safe working conditions and zero accidents. No matter Crawler, Mobile, Tower, Gantry, Overhead or Offshore Cranes and so on.

Q3: What are the products?
A3: Safe Load Indicator(Load Moment Indicator or Crane computer), Crane Monitoring System, CCTV/Camera System, Load cell, Load pin, Length Angle sensor, Anemometers, A2B limit Switch, 3-color Alarming light,etc.

Q4: Is the company well-reputed?
A4: It is a China Top 3 brand focusing on Crane Safety Protection Equipment. We are also Safety Partners for Global Top 100 Crane Owning Companies like Sarens,Tat Hong, Tiong Woon,Asiagroup, Big Crane and Top 500 companies such as ABB, Macgregor,TTS,CNOOC,etc. Products are been sold to over 30 countries and regions globally.

Q5: My Crawler Crane's display could not show anymore, can you assist us? 
A5: Yes, we can replace a new one for you with WTAU LMI system, which will make your old cranes back to normal working again.

Q6: What are the components of your LMI system?
A6:Pls refer to the below pic for compulsory and optional parts. (display, control box, load sensor, angle sensor, 3-color alarm light, A2B limit switch, anemometer)

Q7: How you assure the quality?
A7: The Product Warranty for the total item is 12 months. Any problem after installation, we will change the new one for free.

Q8: How to install the LMI? 
A8: English User Manual(include all the details of each item) will be offered for installation and trouble shooting(refer to the pic below). Also free Remote Instant Technical assistance would be offered by our english engineers. Or we can send our engineers to assist you locally(for a fee).

Q9: How to contact you?
A9: Send your inquiries to us,will reply you within 24 hours.

Q10: How much is your LMI system?
A10: Send me the crane model(like Kobelco 7055, Sumitomo SCX500), hook number, working conditions(Luffing Tower Working Condition, Pilling) and special requirement and the load chart . Your contact info is a must.

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